Keystones — Cornerstone
Five GCSE retrieval questions · 17 June 2026 · mathsvault.uk/keystones
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1. Number
What is the missing number: 97 + ? = 165
Answer: 68 -
2. Algebra
Simplify: 6x + 4x
Answer: 10x -
3. Geometry
Opposite = 6cm, hypotenuse = 12cm. Find the angle
Answer: 30° (approximately) -
4. Ratio
Simplify the ratio 10:12
Answer: 5:6 -
5. Statistics
A bag has 4 red and 3 blue balls. What is the probability of picking a red ball?
Answer: 4⁄7